Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Torsten Bronger]

Hallöchen!

Аl Воgnеr writes:

> [...]
>
> From compact-canon.xml
>
> 
> Canon
> Canon PowerShot G7
> PowerShot G7
> canonG7
> 4.843
> 
>
> I cannot find lens parameters for the G7, but for the G7 X
>
> 
> Canon
> Canon G7 X  compatibles
> ...
>
> So why it makes sense to add a camera, but not the lens paramters?

I makes no sense.  It was added by the original author of Lensfun
long ago.  I removed the model.

Tschö,
Torsten.

-- 
Torsten Bronger

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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Аl Воgnеr]

Am Fri, 27 Oct 2017 13:58:30 -0700
schrieb junkyardspar...@yepmail.net:

> On Fri, Oct 27, 2017, at 13:33, Аl Воgnеr wrote:
> > Am Fri, 27 Oct 2017 12:28:10 -0700
> > schrieb junkyardspar...@yepmail.net:  
> >>
> > > It's not usual to add a compact camera without lens data now, I'm
> > > not sure if the intention was to map it to the lens data for the
> > > G9, since it appears to use the same lens... if you manually
> > > choose this camera and confirm that the corrections seem to work,
> > > I'll make the change. It also appears that the G7 doesn't support
> > > RAW output with stock firmware; are you using aftermarket
> > > firmware? If so, that should probaby be noted in the profile,
> > > especially if this camera applies any automatic correction to
> > > JPEG output.  
> > 
> > When I check
> > https://github.com/lensfun/lensfun/blob/master/data/db/compact-canon.xml
> > it is the same Canon Powershot G9 __X__ has some lens date, but
> > there is no G9.  
> 
> Ack, you're right, it looks like the G9 is another "phantom"
> profile. :/
> 
> Well, you can always submit some calibration images yourself, if your
> interest extends that far:
> 
>  http://wilson.bronger.org/calibration

I don't use this camera anymore, but I think I can get it for a few
days. My biggest problem is how / where to make photos which can be
used for calibration. A glass building with "lines" would be fine, but
I have no idea how to get my camera in the center of the heigth.

Al


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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[junkyardsparkle]

On Fri, Oct 27, 2017, at 13:33, Аl Воgnеr wrote:
> Am Fri, 27 Oct 2017 12:28:10 -0700
> schrieb junkyardspar...@yepmail.net:
>>
> > It's not usual to add a compact camera without lens data now, I'm not
> > sure if the intention was to map it to the lens data for the G9,
> > since it appears to use the same lens... if you manually choose this
> > camera and confirm that the corrections seem to work, I'll make the
> > change. It also appears that the G7 doesn't support RAW output with
> > stock firmware; are you using aftermarket firmware? If so, that
> > should probaby be noted in the profile, especially if this camera
> > applies any automatic correction to JPEG output.
> 
> When I check
> https://github.com/lensfun/lensfun/blob/master/data/db/compact-canon.xml
> it is the same Canon Powershot G9 __X__ has some lens date, but there
> is no G9.

Ack, you're right, it looks like the G9 is another "phantom" profile. :/

Well, you can always submit some calibration images yourself, if your interest 
extends that far:

 http://wilson.bronger.org/calibration

-- 
jys

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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Аl Воgnеr]

Am Fri, 27 Oct 2017 12:28:10 -0700
schrieb junkyardspar...@yepmail.net:

Hi,

> On Fri, Oct 27, 2017, at 08:06, Аl Воgnеr wrote:
> > Am Fri, 27 Oct 2017 15:54:05 +0300
> > schrieb Roman Lebedev :
> >   
> > > On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr
> > >  wrote:  
> > > > darktable 1:2.2.5-0pmjdebruijn1~xenial
> > > >
> > > > http://lensfun.sourceforge.net/lenslist/ mentions the Canon
> > > > PowerShot G7 and the camera is shown with dt, but the lens
> > > > selection is empty.
> > > >
> > > > The activation of the lenscorrection in dt doesn't change
> > > > anything.
> > > >
> > > > Should it work or not?
> > > darktable does not provide or ship the lensfun or lensfun
> > > database. darktable simply uses lensfun installed on your system.
> > > Whatever that lensfun has in it's locally-installed db is what
> > > you can use in darktable.  
> > 
> > From compact-canon.xml
> > 
> > 
> > Canon
> > Canon PowerShot G7
> > PowerShot G7
> > canonG7
> > 4.843
> > 
> > 
> > I cannot find lens parameters for the G7, but for the G7 X
> > 
> > 
> > Canon
> > Canon G7 X  compatibles
> > ...
> > 
> > So why it makes sense to add a camera, but not the lens paramters?  
> 
> The camera entry was added long ago with this commit:
> 
>  
> https://github.com/lensfun/lensfun/commit/ba4551a9040fea333c0af58d6f31249ad2e14c9e
> 
> It's not usual to add a compact camera without lens data now, I'm not
> sure if the intention was to map it to the lens data for the G9,
> since it appears to use the same lens... if you manually choose this
> camera and confirm that the corrections seem to work, I'll make the
> change. It also appears that the G7 doesn't support RAW output with
> stock firmware; are you using aftermarket firmware? If so, that
> should probaby be noted in the profile, especially if this camera
> applies any automatic correction to JPEG output.

When I check
https://github.com/lensfun/lensfun/blob/master/data/db/compact-canon.xml
it is the same Canon Powershot G9 __X__ has some lens date, but there
is no G9.

Of courese I will do testing, when you tell me where to get a lens
description for the G9 / G7.

> Also, for future reference, this is the lensfun list:
> 
>  https://sourceforge.net/p/lensfun/mailman/lensfun-users/

subscribed


> You can also raise issues about lensfun *profiles* here:
> 
>  https://github.com/lensfun/lensfun/issues


Thanks

Al 


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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[junkyardsparkle]

On Fri, Oct 27, 2017, at 08:06, Аl Воgnеr wrote:
> Am Fri, 27 Oct 2017 15:54:05 +0300
> schrieb Roman Lebedev :
> 
> > On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr 
> > wrote:
> > > darktable 1:2.2.5-0pmjdebruijn1~xenial
> > >
> > > http://lensfun.sourceforge.net/lenslist/ mentions the Canon
> > > PowerShot G7 and the camera is shown with dt, but the lens
> > > selection is empty.
> > >
> > > The activation of the lenscorrection in dt doesn't change anything.
> > >
> > > Should it work or not?  
> > darktable does not provide or ship the lensfun or lensfun database.
> > darktable simply uses lensfun installed on your system.
> > Whatever that lensfun has in it's locally-installed db is what you can
> > use in darktable.
> 
> From compact-canon.xml
> 
> 
> Canon
> Canon PowerShot G7
> PowerShot G7
> canonG7
> 4.843
> 
> 
> I cannot find lens parameters for the G7, but for the G7 X
> 
> 
> Canon
> Canon G7 X  compatibles
> ...
> 
> So why it makes sense to add a camera, but not the lens paramters?

The camera entry was added long ago with this commit:

 
https://github.com/lensfun/lensfun/commit/ba4551a9040fea333c0af58d6f31249ad2e14c9e

It's not usual to add a compact camera without lens data now, I'm not sure if 
the intention was to map it to the lens data for the G9, since it appears to 
use the same lens... if you manually choose this camera and confirm that the 
corrections seem to work, I'll make the change. It also appears that the G7 
doesn't support RAW output with stock firmware; are you using aftermarket 
firmware? If so, that should probaby be noted in the profile, especially if 
this camera applies any automatic correction to JPEG output.

Also, for future reference, this is the lensfun list:

 https://sourceforge.net/p/lensfun/mailman/lensfun-users/

You can also raise issues about lensfun *profiles* here:

 https://github.com/lensfun/lensfun/issues

-- 
jys



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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Remco Viëtor]

On vendredi 27 octobre 2017 19:54:38 CEST Аl Воgnеr wrote:
> Am Fri, 27 Oct 2017 17:58:27 +0200
> 
> schrieb Remco Viëtor :
> > 1- Adding a camera and mount definition can be done just from the
> > maker- provided documentation. Adding a lens requires getting good
> > images and calculating the correction factors from those images.
> > Which typically requires someone who has access to the camera and is
> > willing and able to do the work.
> 
> Ok, but this doesn't answer my question, why it makes sense to do this.
> IMHO this is useless, if no lens description is available.

That was under point 2...

> > 2- A mount definition can be valid for a series of cameras. You
> > carefully did not quote the  part of the  definition...
> 
> Did you see that I posted the beginning of the lens description of the
> Canon G7 __X__ ? There is none for the G7 (without X). These both G7
> are totally different. The G7 is not a DSLR camera, it is a top compact
> camera.

 Yes,  and I noticed you did NOT include the  part of the lens 
description.

I did look at the file you referred to, and _every_ lens in there has a  
part in its description...

Oh, well, good luck...

Remco


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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Аl Воgnеr]

Am Fri, 27 Oct 2017 17:58:27 +0200
schrieb Remco Viëtor :

> On vendredi 27 octobre 2017 17:06:04 CEST Аl Воgnеr wrote:
> > Am Fri, 27 Oct 2017 15:54:05 +0300
> > 
> > schrieb Roman Lebedev :  
> > > On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr
> > > 
> > > 
> > > wrote:  
> > > > darktable 1:2.2.5-0pmjdebruijn1~xenial
> > > > 
> > > > http://lensfun.sourceforge.net/lenslist/ mentions the Canon
> > > > PowerShot G7 and the camera is shown with dt, but the lens
> > > > selection is empty.
> > > > 
> > > > The activation of the lenscorrection in dt doesn't change
> > > > anything.
> > > > 
> > > > Should it work or not?  
> > > 
> > > darktable does not provide or ship the lensfun or lensfun
> > > database. darktable simply uses lensfun installed on your system.
> > > Whatever that lensfun has in it's locally-installed db is what
> > > you can use in darktable.  
> > 
> > From compact-canon.xml
> > 
> > 
> > Canon
> > Canon PowerShot G7
> > PowerShot G7
> > canonG7
> > 4.843
> > 
> > 
> > I cannot find lens parameters for the G7, but for the G7 X
> > 
> > 
> > Canon
> > Canon G7 X  compatibles
> > ...
> > 
> > So why it makes sense to add a camera, but not the lens paramters?  
> 
> 1- Adding a camera and mount definition can be done just from the
> maker- provided documentation. Adding a lens requires getting good
> images and calculating the correction factors from those images.
> Which typically requires someone who has access to the camera and is
> willing and able to do the work.

Ok, but this doesn't answer my question, why it makes sense to do this.
IMHO this is useless, if no lens description is available.

> 2- A mount definition can be valid for a series of cameras. You
> carefully did not quote the  part of the  definition...

Did you see that I posted the beginning of the lens description of the
Canon G7 __X__ ? There is none for the G7 (without X). These both G7
are totally different. The G7 is not a DSLR camera, it is a top compact
camera.

> And as Roman already said, darktable only uses the lensfun library,
> it neither provides it, nor maintains it. So I guess any questions
> regarding the data from the lensfun project are better directed to
> the lensfun project.

I asked it, because some G7 user could tell me, it works fine for him
and I have something wrong in my system. Many years ago the G7 was the
top model of Canon's compact cameras.

Al

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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Remco Viëtor]

On vendredi 27 octobre 2017 17:06:04 CEST Аl Воgnеr wrote:
> Am Fri, 27 Oct 2017 15:54:05 +0300
> 
> schrieb Roman Lebedev :
> > On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr 
> > 
> > wrote:
> > > darktable 1:2.2.5-0pmjdebruijn1~xenial
> > > 
> > > http://lensfun.sourceforge.net/lenslist/ mentions the Canon
> > > PowerShot G7 and the camera is shown with dt, but the lens
> > > selection is empty.
> > > 
> > > The activation of the lenscorrection in dt doesn't change anything.
> > > 
> > > Should it work or not?
> > 
> > darktable does not provide or ship the lensfun or lensfun database.
> > darktable simply uses lensfun installed on your system.
> > Whatever that lensfun has in it's locally-installed db is what you can
> > use in darktable.
> 
> From compact-canon.xml
> 
> 
> Canon
> Canon PowerShot G7
> PowerShot G7
> canonG7
> 4.843
> 
> 
> I cannot find lens parameters for the G7, but for the G7 X
> 
> 
> Canon
> Canon G7 X  compatibles
> ...
> 
> So why it makes sense to add a camera, but not the lens paramters?

1- Adding a camera and mount definition can be done just from the maker-
provided documentation. Adding a lens requires getting good images and 
calculating the correction factors from those images. Which typically requires 
someone who has access to the camera and is willing and able to do the work.

2- A mount definition can be valid for a series of cameras. You carefully did 
not quote the  part of the  definition...

And as Roman already said, darktable only uses the lensfun library, it neither 
provides it, nor maintains it. So I guess any questions regarding the data 
from the lensfun project are better directed to the lensfun project.


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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Аl Воgnеr]

Am Fri, 27 Oct 2017 15:54:05 +0300
schrieb Roman Lebedev :

> On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr 
> wrote:
> > darktable 1:2.2.5-0pmjdebruijn1~xenial
> >
> > http://lensfun.sourceforge.net/lenslist/ mentions the Canon
> > PowerShot G7 and the camera is shown with dt, but the lens
> > selection is empty.
> >
> > The activation of the lenscorrection in dt doesn't change anything.
> >
> > Should it work or not?  
> darktable does not provide or ship the lensfun or lensfun database.
> darktable simply uses lensfun installed on your system.
> Whatever that lensfun has in it's locally-installed db is what you can
> use in darktable.

From compact-canon.xml


Canon
Canon PowerShot G7
PowerShot G7
canonG7
4.843


I cannot find lens parameters for the G7, but for the G7 X


Canon
Canon G7 X  compatibles
...

So why it makes sense to add a camera, but not the lens paramters?

Al

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Re: [darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Roman Lebedev]

On Fri, Oct 27, 2017 at 3:19 PM, Аl Воgnеr  wrote:
> darktable 1:2.2.5-0pmjdebruijn1~xenial
>
> http://lensfun.sourceforge.net/lenslist/ mentions the Canon PowerShot
> G7 and the camera is shown with dt, but the lens selection is empty.
>
> The activation of the lenscorrection in dt doesn't change anything.
>
> Should it work or not?
darktable does not provide or ship the lensfun or lensfun database.
darktable simply uses lensfun installed on your system.
Whatever that lensfun has in it's locally-installed db is what you can
use in darktable.

> Al
Roman.

> 
> darktable user mailing list
> to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
>

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[darktable-user] Lensfun - Canon PowerShot G7 (1st generation) supported by darktable?

[Аl Воgnеr]

darktable 1:2.2.5-0pmjdebruijn1~xenial

http://lensfun.sourceforge.net/lenslist/ mentions the Canon PowerShot
G7 and the camera is shown with dt, but the lens selection is empty.

The activation of the lenscorrection in dt doesn't change anything.

Should it work or not?

Al

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